Instead of the colourless air of the uplands the atmosphere down there was a deep blue.
The colourless, pungent gas does not dissipate easily. So bystanders and would-be rescuers are put at risk.
Poplar wood is colourless, odourless and tasteless, making it highly suitable for fruit boxes, medical tools, chopsticks, flooring and furniture and manufacturing pulp and paper.
Though many creatures of the soil layer are a drab grey-brown or pale and colourless, there is no reason why a few cannot be bright and garish.
Here is a liquid as colourless as water, almost tasteless, quite imperceptible in coffee, wine, or any other beverage. It is also quite imperceptible to any known method of autopsy.
